Calculating machine



Feb. 9, 1943. c. M. F. FRIDEN 2,310,281

CALCULATING MACHINE Filed Sept. 26, 1935 6 Sheets-Sheet l IN VEN TOR.

Car/ M F Fr/oen BY 69mg 7 4% A TTORNEY Feb. 9, 1943. c. M. F. FRIDENCALCULATING MACHINE Filed Sept. 26, 1955 6 Sheets-Sheet 2 wk RN QQM N?R. M

m 5 mm INVENTORI. Car/ M. f Fr/oen BY WM 7/QZ ATTORNEY l mun-ml Feb. 9,1943. c. M. F. FRIDEN CALCULATING MACHINE Filed Sept. 26, 1935 6Sheets-Sheet 3 INVENTOR. Car/ M E Fr/oen ATTORNEY Feb. 9, 1943. c. M. F.FRIDEN CALCULATING MACHINE Filed 'Sept. 26, 1935 6 Sheets-Sheet 5 umw ww f NR 5 5 m 7 m \R g 3 WW .5

IN V EN TOR. Car/M F Fr/oe/v ATTORNEY Feb. 9, 1943. c. M. F. FRIDENCALCULATING MACHINE Filed Sept. 26, 1955 6 Sheets-Sheet 6 M wfln n m m 0mf MWW U a Patented Feb. 9, 1943 CALCULATING MACHINE Carl M. F. Friden,Oakland, Calif., assignor. to

Friden Calculating Machine 00., Inc., a corporation of CaliforniaApplication September 26, 1935, Serial No. 42,268

17 iClaims.

My invention relates to calculating machine having shiftable numeralwheels and more particularly to means for restoring such-numeral wheelsto zero registration;

In calculating machines having an ordinally shiftable register carriageit is necessary at the end of a multiplication or division problem toreturn the carriage to its initial position and to zeroize the numeralwheels of the registers in preparation for solution of the next problem.In known machines, such functions have been performed separately so thatthe operator'must make two separate operations to condition the machinebetween successive calculations. According to the present invention,these functions are placed under a single control and the operator hasonly one operation to perform in restoring the register carriage to thedesired position and zeroizing the registers. In addit on, theconstruction of the machine is such that while the carriage is beingreturned and the registers are being zeroized during operation of theactuating means, the next value can be entered in the keyboard.

My invention is especially useful in calculating machines having anactuator or actuating means of the universal operation continuous drivecycle type, where all power driven machine operations are performedunder control of various means whose drive is effected by driving themain actuating means and where a single line of power flow is providedfrom the source of power, such power flow being continuous anduninterrupted during a machine operation irrespective of the variousfunctions which may be imposed on the machine,

such as carriage shifting, both positive and negative value entering,and numeral wheel resetting or zeroizing. During certain of theseoperations such a carriage shifting and zeroizing, the drive connectionbetween the numeral wheels and the actuating means is in its normalineffective position. With this type actuator, a single cyclicallyoperable clutch is provided which is engaged at the beginning of anoperation and remains en gaged throughout the operation so that theactuator drive is continuous and uninterrupted.

It is an object of the invention, therefore, to provide improved meansfor restoring a calculating machine to normal condition betweensuccessive machine operations.

Another object of the invention is to provide an improved calculatingmachine which is restored to normal condition by operation of mechanismincluding the actuating means.

Another object of the invention is to provide an improved calculatingmachine in which values can be entered while the machine is beingrestored to normal condition by operation of mechanism including theactuating means.

Another object of the invention i to provide an improved calculatingmachine in which parts of the actuating means transmit the drive for allpower driven machine operations.

Another object of the invention is to provide improved zero resettingmeans for the shiftable numeral wheels of a calculating machine whichenables a simple and inexpensive construction.

Another object of the invention is to provide means for resetting theshiftable numeral wheels of a calculating machine by a power drive froma non-shiftable source of power, the construction of the resetting meanslending itself to economical manufacture and assembly.

Another object of the invention is to provide improved means forresetting the shiftable numeral wheels of a calculating machine by apower drive from anon-shiftable source of power irrespective of thedisplaced position of the numeral wheels.

Another object of the invention is to provide improved shifting meansfor the shiitable car.- riage of a calculating machine.

Another object of the invention is to provide improved shifting meansfor the shiftable carriage of a calculating machine so that the carriagecan be returned to a selected position from any other position thereof.

Another object of the invention is to provide a calculating machinehaving a universal operation continuous drive cycle type actuator andwhich attains the foregoing objects.

.' Another object of the invention is to provide improved safety devicesfor preventing misoperation of a calculating machine.

Other objects will be apparent from the following description, taken inconnection with the appended drawings.

In the drawings:

Figures 1 through 10' illustrate the preferred form of the invention.

Fig. 1 is a vertical, longitudinal section of the rear part of themachine taken in a plane thru the axis of the actuating means of oneorder of machine.

Fig. 2 is a fragmentary plan view of the actuating means and the driveconnections for the carriage shift and register zero resetting means.

Fig. 3 is an'elevational view of the right side frame member and theoperating controls mounted thereon as viewed from the right. Theregister carriage is omitted.

Fig.

parts shown in section.

6 is a fragmentary vertical section through the carriage as is taken ina plane indicated by the line d-@ in Fig. 5.

Fig. 7 is a'plan view oi the right end of the carriage with the casingremoved and certain parts broken away to show the construction moreclearly.

Fig. 8 is a fragmentary sectional view of certain of the operatingcontrols. The view is indicated by the line 87-43 in Fig. 2.

Figs. 9 and 10 are rear views similar to Fig. illustrating the zeroresetting means at different stages of the operation thereof.

Figs. 11 through 13 illustrate a modified form of the invention.

Fig. ii is a fragmentary side elevational view of the control meanssimilar to Fig. 3.

Fig. 12 is a fragmentary rear elevational view of the resetting meanssimilar to Fig. 5.

Fig. 13 is a sectional view taken in a plane indicated by the line 53-43in Fig. 12.

My invention is disclosed as embodied in a calculating machine having anactuator of the universal operation continuous drive cycle type. Acomplete machine of this type is illustrated in my co-pendingapplication Serial No. 724,482, died May 8, 1934i.

Generally, the machine comprises a frame and a carriage mounted forlateral shifting move ment on the frame. The carriage mounts theregisters oi. the machine comprising the accumulator and the revolutionscounter, while the frame provides a support for the various mechanismsfor entering values in the registers. The frame includes base iii (Fig.l) which supports casing ii and has left and right side frame memi2, i3(Figs. i and 2) mounted thereon. hide members l2, it are connected byvarious cross frame members it, ii, is and is which serve to mountvarious mechanisms referred to hereinafter. Register carriage 2? (Fig.l) is mounted on frame members it and it by rollers for endwise shiftingmovement laterally of the machine in either direction to various ordinalpositions as controlled by means described here= inaiter.

Accumulator Register carriage 22 (Figs. 1 and 7) includes carriage frameat formed of opposite U-shaped members 82, 38 which are secured togetherby suitable fastening means such as screws. Sim-= ilar end plates 34(Fig. '7) are secured to the ends oi frame 3i and support cross member36 (Figs.

1 and 7) in spaced relation from frame 50. The accumulator comprisesdisk type numeral wheels 3i (Fig. l.) secured at the upper ends ofnumeral wheel shafts 32 (Figs. 1 and 7) journalled in spaced relationbetween members 82, 33 of caropenings, (13 by ten==tooth gear 66 onshaft 62 and a spring-pressed ball is mounted in carriage frame member33 and engaged with gear d6. This mechanism also serves to prevent over=throw of wheels ii ait eractuation thereof. To W asiaasi transmitincrements of value to numeral wheels i each shaft 32 extends belowcarriage frame 3i and has ten-tooth numeral wheel gear ll which isactuated by means described later.

Accumulator resetting means Means are provided in carriage 22 forresetting numeral wheels iii to zero registration which includes meansfor restoring any displaced wheels ill to zero position and means forarresting such wheels positively in zero position. The restoring meansincludes rack bar 5| (Figs. 1 and 7) mounted for endwise sliding.movement in carriage frame member: 33 adjacent the upper ends ofnumeral wheel shafts (12. The teeth of rack bar 5i (Fig. 7) are cut awayat 52 alternately at the top and bottom to form a plurality of separateracks for cooperation with mutilated gears 53 on numeral wheel shaftsd2. Adjacent gears 53 are axially ofiset to cooperate with the adjacentvertically ofiset racks formed on rack bar 58 by cut away portions 52'thereof. When rack bar 56 is in normal inactive position, gears 53register with cutaway portions 52 so that numeral wheels ll can beactuated without interference. If rack bar 5i is moved to the right asviewed in Fig. '7, the unmutilated parts of gears 53 of any numeralwheels ll displaced from zero position will be engaged by the associatedracks on bar 55 and such displaced numeral wheels ii are turned untilrestored to zero position. In this connection it will be noted that anynumeral wheels ii in zero position will not be moved by rack bar 5ibecause the mutilated portions of gears 53 of such numeral wheel facethe rack bar. For manual operation rack bar 5i is provided with handle56 (Figs. 6 and 7) by means of which bar 5i can be actuated against thetension of a suitable spring (not shown) which normally maintains bar Siin inactive position.

The movement of bar 5G to the right as viewed in Fig. 7 to restore anydisplaced numeral wheels li to zero position also enables the means forarresting wheels (ii in such position. Stop slide 6i (Figs. 1 and '7) ismounted for limited end=- wise movement on top of carriage frame at bysuitable pin and slot connections, and is pro= vided with a stopprojection 62 (Fig. 7) for each numeral wheel ii. Each numeral wheelshaft d2 has a stop tooth 63 secured thereon for co= operation withprojections 62 in the zero posi= tion of numeral wheels ii. Slide 5i isheld normally in inactive position by suitable spring means (not shown)so each projection 62 is out of the path of the associated tooth 63. Topro= vide for movement of projections t2 into path of teeth as whenzeroizing the numeral wheels, bellcranlr t l, pivoted at 66 on carriageframe at, has a suitable pin and slot connection at one end with slide6! and has cam surface ti at its other and disposed in the path of arm68 on rack bar 58. Thus, when bar 5i is moved to restore numeral wheelsii to zero position, slide ti is moved through bellcrank 6 3 to arrestwheels (ii in such position.

Thus, the accumulator can be reset to zero registration manually bymanipulation of handle at. The power operation of the resetting or zero=izing means is described hereinafter.

by carriage 22 comprises numeral wheels ii on respective shafts it,which are Journalled in carriage frame member 32 and cross member 38.

fem

di cfii.

wheel l is ordinal position oi the marriage. The each wheel ll (Fig. l)es, irisihteihecl with the essocietecl sight opemhgs o tee.

overtl'irow of humetel Revolutions counter rese -ing means Meehs areprovided 101* resetting humeral wheels ll of the revolutions counter tozero, and such means s very similar to that described connection withaccumulator numeral Wheels ll, u general description thereof willsu'ilce. lltecls he: (Figs. l and 7), similar to reel: our 55, ishiouh'ed for ends-Ilse movement by Elm cls ll on carriage ume "member(Fig. "1) oh sh 1 outlet mutilated gee use essocietecl with so thatmovement of hisuipuletioh oi hahdle lit to the lit by serves to restorehumeral Wheels zero position. Slide formed similarly to slide ill, imounted tor cooperation with stop teeth 2 wheels ll end is spring; urgedto ecti' e peel-- cu, being restreihecl thercilom by pie ch "oer Theoperation of the shove described zero resetting means is similar to thatclescrlheel in cormecti o. with the uccumuletor resetting Interlock Auinterlock is provided for the zero resetting means of ooth registers andthe operating sou ttols for determining enteritis of velues in thei'eglsters. Looking slide (Figs. 6 1 ere ends through suitable slots incarriage frame ill closely ucljeceht ends of reel: hers El. and is urgedto the "position shown by spring ill disposed in to slide shcl Halliforessecl between slicle and carriage soc-o position li; operation,being uncles siicle so. i. movement of slide so is preveuteei by virtueof its ihterei'iszegemeht with the oispleced car. At its left end, asviewed in Fig. 6 slide to hes extensionv 88 with which i h Q the regsters is operated. iehsth 7) tion with member in shifted position oi "hecot resetting hers ll c b5 movement of sell all Eti'lil 4 i all suchopen sting controls can 1 operated. 'Cohve'l'selv,

' means thereforwhich see LQJSO, provided with zeroizihg rhesus "Sheactuating the carriage.

isle

to 9 and the right so h on such cylinder. jyliucl s (Figs. 3. and 2) eremounted on actuating sholts l l'l having suitable bevel gear connectionswith transverse shaft etc which is suitably jou oiled in sioie membersEach shaft serves f0]. two orders of the machine and; hes a. pair ofcylinde s mounted thereon. Shel shafts are driven cyclical]; from(Fig. 1) thru clutch fill (Figs. 3 one e) driven by suitable gearing.rom s As explained in my ssicl co-pendiug' up cation, clutch is engagedor disengaged. oscillation oi sprihg urgecl clutch pet-vi or Eli (Fig.4) mounted for rotation with shaft l and with respect to ratchetjoumslleoi shaft 3 15, i

control lever: te mines engagement or :llseagoge clutch by releasing orlit in the full cycle position thereof.

From the above LlQSCTlDtiOi'l, it is so values set in the machine bydepress $65 wi l i -ero mg the nose of oog dess is co.

s 1., machine tllru end jouroellecl cross member mediate members i sspool and 11 rotstoiolv ihou ed on each end has opposite bevelpositioned Zor coo eict with no Therefore, men one or gears is, isengaged with :eers i Wheels will be i'otcterl i let lv or reversely toregister a number of increments equal to ee value of the depressed keysin the oeulis of lze s.

To control the ehgsg'em (Fig. l) with able arms for recluse movementwith Thus, by rocking shaft either set cam be si t I by str in lg. iinto to o gears ll. UCEQ'S transmit 3o crements and gears lih'i transmitnegative incregears I23, I24 and for simultaneously enabling the drivethrough clutch I I I, as for example, the plus and minus keys and thedivision control lever disclosed in said application.

Centralizing means is provided for resiliently urging strap I26 andgears I23, I24 to their central neutral position. For this purposeopposed arms 52! (Fig. 1) are pivotally mounted on side plate I2 withtheir upper ends engaging opposite sides of a pin 522 on a supportingarm for strap I26. Arms 52I are connected by spring 523 so that the armsyieldably resist movement of the plus-minus gears I23, I24 from theirineffective position shown in Fig. 1.

Transfer mechanism The number of actuations of accumulator numeralwheels M are registered either positively or negatively in countingnumeral wheels 1! by actuator I36 (Fig. 1) which is driven and operatedby conventional means such as cam drum I34 (Fig. 2) and cam disc I35 ina manner fully described in said application to enter single incrementsin the active order of the revolutions counter and to carry from orderto order in higher orders thereof.

Carriage shifting mechanism Means are provided for shifting the carriagein either direction from one ordinal position to another manually byreleasing the carriage for free shifting movement and also by powerdriven means controlled by manually operable keys. Preferably, the powerdriven means comprises a part of the actuating means for entering valuesinto the accumulator. Carriage 22 (Fig. has plate I5I mounted along therear side thereof by means of adjusting screws I52 threaded in bracketsI53 on carriage frame 3| and having smooth ends pivotally engaged withlaterally projecting end portions I54 of plate I5I. Plate I51 hasvertical slots I51 formed in the lower edge thereof by teeth I58, slotsI51 being spaced apart a distance equal to the ordinal spacing of themachine and. aligned with drive shafts I2I. Slots I51 are adapted forengagement by opposite shift pins I6I on shift gear I62. Gear I62 isjournalled on cross frame member I6 and is rotated by means describedlater to shift the carriage by virtue of the engagement of pins I6I inslots I51; such engagement also serves to lock the carriage in position.One half revolution of gear I62 effects one ordinal spacing of carriage22 and to provide for accurate centering of the carriage at the end of ashift, centralizing cam I63, is mounted for rotation with gear I62.Centralizing arms I64 suitably pivoted at one end on frame member I6have suitable rollers at their opposite ends engaging opposite sides ofcam I63 under the influence of spring I66 tensioned between arms I64.When pins I6I are in horizontal alignment the carriage is properlypositioned and the centralizing rollers are seated in oppositedepressions formed between the high portions of cam I63. Accurateinitial positioning of carriage 22 with respect to pins IBI is providedby adjusting screws I52, which are adjusted with the parts positioned asdescribed.

The manual release of the carriage for free shifting movement iseffected by rocking plate I51 out of engagement withpin I6I of shiftgear I62. Plate I5! is maintained resiliently in operative position byspring I66A (Fig. 6) tensioned between carriage frame 3| and endextension I61 of plate I5I. Carriage release handle I68 (Figs.

5 and 7) is journalled in carriage end plate 34 in axial alignment withscrews I52 forming the pivotal axis for plate I5I, and has its inner endrigidly but removably connected to the bent end of extension I61 ofplate I5I. Thus by tuming handle I68, plate I5I can be moved out ofengagement with pins I6I to permit free shifting movement of thecarriage. To prevent simultaneous operation of carriage release handleI68 and any operating control which determines entering of the values inthe registers, extension I61 (Figs. 6 and 7) of plate I5I has arm I69secured thereon with its bent end normally positioned above lockingslide 86 as shown in Fig. 6. If handle IE8 is operated to release thecarriage, arm I69 moves into the cooperating recess in slide 86 formedby projection I10 thereof, thereby blocking movement of slide 86, bailiii and locking member 93. Conversely, if such an operating control bemanipulated, projection I10 is moved beneath arm I69 to preventoperation of carriage release handle I68. It is seen from the abovedescription that the carriage cannot be released for free shiftingmovement if a value is being entered in the registers, and, conversely,if the carriage is so released the value entering operating controlscannot be operated.

Resilient bumper means is provided for preventing shifting of thecarriage beyond its left hand end position, to which it is usuallyreturned to begin a calculation. Bumper lever I12 (Fig. 5) is pivoted atI12 on cross frame member I6 and has its upper end positioned forengagement with the head of left adjusting screw I52 (to the right asviewed in Fig. 5) when the carriage is in its left end position. Thelower end of lever I1I is notched at I13 for engagement by the nose ofcentering arm I14 under the tension of spring I16. Arm I14 is pivotedeccentrically at I11 to provide for accurate positioning of bumper leverI11 Thus, centering arm I14 maintains bumper lever I1I resiliently inplace. The movement of lever I11 when struck by the carriage is limitedby the engagement of abutment I18 thereof with the top of left sideframe member I2. 1

Yieldable means are provided to prevent shifting of the registercarriage beyond the lowest and highest ordinal positions thereof duringpower operation of the shifting means. End slots I51 are formed in partby end teeth I58 and in part by respective pawls ISI, I82. Pawls I8I,I82 are pivoted at I83, I84, respectively on plate I5I and extendinwardly to' position the straight end edges thereof opposite end teethI58 to form end slots I51. Pawls I8I, I62 are held resiliently in theposition shown against respective stop pins I86 by spring I81 tensionedtherebetween. When carriage 22 is in the end position shown, one pin I6Ilies in an end slot I51 and the other is positioned beneath adjacentpawl I82 in engagement with cam edge I68 thereof. In

this condition rotation of gear I62 in a direction to move the carriagebeyond the end position merely results in oscillating pawl I82 by actionof pins I6I on cam edge I88. However, upon rotation of gear I62 in adirection to effect carriage shifting to an intermediate ordinalposition, the end edge of pawl I82 positively resists the pin I6I gearI62 in end slot it? and carriage shifting; res its l similar actionoccurs if the carriage is its position adjacent pawl i851. it is seen,the that the carriage cannot be shifted beyond either in? positionthereof by operation of slnit As stated above, shift iiii is rotatableeither direction by selectively operable drive con nections withactuating means of the rnachine. For this purpose, the two lowest orderactuating shafts 30'! (Fig. 2) are extended rearwardly and haverespective collars 20! secured adjacent the ends thereof. Each collarit! is provided with opposite slots slidablv engaged by correspondingteeth 202 or a shiftable drive es tablishing collar 203 mounted freelyon the end of shaft Hi'l. Opposite teeth 2B2 thereof, each collar 203has smaller teeth 2% adapted for em easement with corresponding slots inrespective gear sleeves 20B, 201, which are journalled in cross framemember l6 and small plate 233 mounted on member 56 by suitable spacersand fastening screws. Gear sleeve Hit? (Figs. 2 and 5) has gear 21!meshing with idler gear till (hi 5) journalled in frame member iii andplate 208 and also meshing with shift gear W2. Gear sleeve 20! (Figs. 2and 5) has gear M3 (Fig. 5) offset axially from idler gear M2 andmeshing with wide reverse idler gear 2 suitably jour nailed in framemember l6 and plate 2nd and also meshing with idler gear 212. Thus,rotation of gear sleeve 2% in a clockwise direction as viewed in Fig. 5causes clockwise rotation of shift and shifting of carriage 22 to thleft as viewed from the front of the machine. Corre spondingly, rotationof gear sleeve in clock wise direction as viewed in Fla. 5 effectscounterclockwise rotation oi shift gear it? and shifting of carriage 22to the right as viewed from the front of the machine. Thus, by selectiveestablishing of drive connections between sear sleeves 208, 20"! (Fig.2) and collars mi awn selective shifting of respective si. ,ii'iecollars riage 22 can be shifted in either direction. gear ratios are sochosen that one rotation of actuating shafts iii? effects one-halfrotation of shift gear I67.

Manually operable control means are provided The for the carriageshitting mechanism described above to enable selective shifting oi thecarriage in either direction. through one or more ordinal. spaces. Shiftkeys 22L 222 (Figs. 3 ii) are depressible to initiate shifting of thecarriage to the right and left respectively as viewed from the front ofthe machine, and as indicated the arrows. Depression of either keyserves to enable a drive connection. from the actuating means to thecarriage shifting mechanism do ing the first part of its dowritvardmovement and thereafter to engage the clutch and energize the motor.Keys 2', 222 (Fig. 3) are mounted for endwise movement by suitablelongitudinal slots formed therein and engaged by a plurality studs 223secured on side member iii. Keys 22!, 222 have adjacent ears withspective studs 22?, 22% mounted therein and en: tended to either sidethereof. To maintain shift keys resiliently in raised "ition, coil spziu13! (Fig. 8) is provided having its taste to side member i3 and passingover upper studs 223 and under the ends of studs 2231, 22c which extendthrough suitable slots in side member it. To enable the drive connectionfrom the actuat== ing means to the carriage shifting mechanism stud 221engages the upper end of arm .232 se ill that depression of key in aclockwise dirrectic 250 will resul" and is r a spring compressei and asuitable washer on rod end, rod 233 (Fig. 2) shift to thereon with its.forked end in enga an annular groove in right hand sin 2%. lrrom theforegoing descr t stud 2227i to rock arm 232, A to move rod rearwardlymovement of rod 238 is ei'iec" iorl; Hi to engage teeth of collar 2%with corresponding 207. Thus, initial depression of shift effected toenable drive actuating means to the I nism. The drive cennectionh. 201and its associated collar shifting of the carriage to rig-ht. A similarmechanism is employed tion with shift key 222 to enable nection todetermine shifting of the c the left. Stud 3) is c in sonnet:

is: is

We upper end of arm 2% having its hub s shaft 2%. At its ii i" l it eait depending aim T l therefore, that depression of lrey reciting ofshaft rearward rod to engage lei shift co co s amount of moveme" 294with the co so that slots in we connection is e of the dorms/"arr."movelever by nivot S and by pin and nection ha' e5" suitable clampingmaintaining" relative d vers 24 5i, lever either oi keys ter gee rt oithe motelat its upper end lint: clutch control iii which adapts 328respectively. For exam ple, in key E23 pressed, lock portion 262 movesinto blocking position beneath stud 228. Shift keys 221, 222 are alsosuitably interlocked with the plus anctminus keys for determiningpositive and negative value entering as fully disclosed in my copendingapplication, Serial No. 27,338, filed June 19, 1935.

Means are provided for maintaining the drive connection from theactuating means to the carriage shifting mechanism throughout each cycleof movement even though the depressed shift key be released immediatelyafter depression thereof and before complete shifting of the carriage.For this purpose each shiftable collar 203 is provided with a similarmechanism, only one of which will be described. Right-hand shiftablecollar 203 (Fig. 2) is provided with disc 211 having a cut away portion212 which, in the full cycle position of collar 203,-is in the positionillustrated in Fig. 5. Immediately to the rear of disc 211, lockingelement 213 is provided mounted in bracket 214 for movement radially ofcollar 203, and urged to its extended position by spring 216. Withshiftable collar 203 in its inactive position disc 211 is positionedforwardly of locking element 213 and when moved rearwardly of themachine to its active position passes by element 213 which is inalignment with the cutaway portion 212. Upon subsequent rotation of disc211 the solid portion thereof engages element 213 and prevents movementof collar 203 forwardly of the machine so that teeth 202 are maintainedin engagement with gear sleeve 201 irrespective of release of theassociated shift key. Left hand shiftable collar 203 is held in driveestablishing position for each cycle of rotation by similar mechanism. 4

From the foregoing description it is seen that keys 221, 222 and theassociated mechanism provide means for shifting the carriage selectivelyin either direction from one ordinal position of the carriage toanother. Obviously, if a shift key be maintained in depressed position,shifting will continue until the carriage reaches an end position,.when, as previously. described, continued operation of the shiftingmechanisminthesame direction becomes inefiective."

Add key release mechanism In operation of the machine, it is usually desirable that the add key, which in active position causes release of alldepressed numeral keys after a single actuation, be disabled duringoperations, such as division, involving shifting of the carriage as ausual preliminary to the operation. To effect this end, means areprovided under control of the shift keys for disabling the addkey. Addkey 281 (Figs. 3 and 8) is mounted for endwise and pivotal movement onside member 13 by stud 282 (Fig. 3) which engages a slot adjacent thelower end of key 281. Key 281 is held normally in raised inactiveposition by spring 233, which also serves to maintain notch 284 in key201 engaged with pin 286 to latch key 281 in depressed position. In itsdepressed active positionkey 281 positions arm 281 in blocking relationto lug 288 of division setting-slide 239 as fully disclosed in myco-pending application Serial No. 35,619, filed August 10, 1935. Themechanism for releasing automatically any depressed numeral keys 101under control of key 281 is fully disclosed in said application SerialNo. 724,482. To release add key 281 upon depression of one of shift keys221, 222, lever 291 (Fig. 8) is pivoted at 292 on side member 13 and hasone arm 293 disposed beneath and spaced from studs 221,228 of shift keys221, 222 and the other oifset arm 294 with its laterally projecting end.in operative relation with cam surface 230 of key 281, when key 281 isin raised position. With the parts positioned as illustrated in Fig. 8,depression of either of shift keys 221, 222 produces no movement oflever 291. However, when add key 281 is depressed, lever 291 is rockedin a clockwise direction as viewed in Fig. 8 to place arm 293 thereofimmediately below studs 221, 228 Thus, if add key 281 is depressed,during the first part of the downward movement of either of studs 221,228 caused by depression of a shift key, lever 291 will be rocked in acounter clockwise direction (Fig. 8) to move add key 281 to the left asviewed in Fig. 3 and disengage notch 284 and pin 286. Spring 283 thenbecomes effective to raise add key 281 to its inactive position. It isseen, therefore, that if the add key is depressed.

depression of a shift key serves to normalize the add key by restoringit to raised inactive position.

Normalizing mechanism As stated in the introduction, means are providedfor restoring the machine to normal condition between successiveoperations. The restoring being effected by returning the carriage toits left hand position and by resetting the accumulator to'zero afterits return to such position. Both of these functions are controlled by asingle manipulable member which is operated by a single manual stroke.Also, while the machine is being normalized, the value desired can beset in the keyboard for the next operation.

Carriage return and register resetting key 311 (Fig. 3) is operativeupon depression thereof to establish a drive connection between thepower driven resetting mechanism and the actuating means and to initiatea carriage shifting operaleased. Key-311 is mounted on side member 1.3---ad'jacent shift key 222 for substantially endwise at 313 team 314(Figs. 3 and 8) on shaft 318.. "Key 311 is urged to its raised positionby spring 311 (Fig. 8) secured to extension 318 of arm 314. Intermediateits ends, key 31 1 (Fig. 3) is provided with latching notch 321 forcooperation with latching slide 322. In the raised position of key 311,slide 322 has its nose engaged with cam surface 323 on key 311 belownotch 321. Slide 322 is mounted for endwise sliding movement by means ofpin 324 engaging a slot at the front end of slide 322 and by a pivotalconnection at its zero resetting drive means. The zero resetting drivemember comprises slide 331 (Figs. 2 and 5) mounted for endwise movementon frame member 10 by brackets 332. Slide 331 has vertical projection333 terminating in lateral extension 334 which comprises the active partof actuating slide 331. When carriage 22 is in its left end position asillustrated in Fig. 5, extension 334 is arm 336 to the position shownwith pin 343 engaged with a surface of carriage frame member 33. Withthe parts positioned as illustrated in Fig. 5, it is seen that uponmovement of slide 33! to the left, lateral extension 334 will engage theend of arm 336 to reciprocate resetting rack bar 5! and effect resettingof the accumulator wheels 42 in the manner previously described.

. The means for actuating slide 33! (Fig. 5) includes arm 35! pivoted at352 on plate I6 and having a slot at its upper end engaged by pin 353 onslide 33!. Intermediate its ends, arm 35! has roller 354 joumalledthereon for cooperation with cam 356 under the influence of spring 351.Cam 356 (Fig. 2) has hub 358 journalled in plate I6 and in small plate36! mounted in spaced relation to plate I6 by suitable spacers andstuds. Hub 358 of earn 356 extends thru plate I6 and has oppositenotches 362 for cooperation with corresponding teeth 363 of collar 364shiftably mounted on the end of an actuating shaft I81. Opposite teeth363, shiftable collar 364 has similar 't'eth 366 constantly engaged withcorresponding notches" in' collar-361 secured on said actuating shaftI01 adjacent thdendthereof. Shiftable collar 364, therefore, providesmeans for establishing a drive connection from the actuat ing means tothe zero resetting drive member. Collar 364 has an annular groove toreceive shift fork 31! mounted at the rear end of rod 312 which issupported for endwise sliding movement in cross members I1, I8. Rod 312is spring-urged to its forward position by spring 313 in the same manneras rod 238 and spring 238 of the carriage shifting mechanism. The frontend of rod 312 is normally engaged with radial end surface 316 of arm311 (Figs. 1 and 2) secured on shaft 3I6 which is movably supported inside members I2, I3. Arm 311 (Fig. 1) has a second radial end surface318 of greater radius than surface 316 and connected thereto by asuitably inclined surface. Thus, clockwise movement of arm 311, asviewed in Fig. 1, causes endwise movement of rod 312 until it is engagedwith surface 318. It is seen, therefore, that depression of return andreset key 3!! serves, by rocking shaft 3I6 and arm 311, to engage teeth363(Fig. 2) of shiftable collar 364 with notches 362 of cam hub 358thereby enabling the drive connection from the actuating means to thezero resetting drive member. As key 3!! is latched in depressedposition, such drive connection will remain enabled-until release of thelatch as described hereinafter.

To initiate the carriage return determined by depression of key 3!!,shoulder 38! (Fig. 3) is provided on key 3!! overlying lug 382 of shiftkey 222. Thus, depression of key 3!! also causes depression of shift key222 and initiates a shifting operation as described in connection withkey 222. Because key 3!! is latched in depressed position, carriageshifting will continue until return of the carriage to its left endposition.

As stated above, and it will be more apparent from the description ofthe operation, the carriage is returned to its end position if displacedtherefrom, and the next revolution of the actuating means is efi'ectiveto reset the accumulator to zero and to release the latch for key 3! I.To effect the latch release, pawl I82 (Fig. 5) has arm 38! terminatingin shoulder 382 and latch releasing extension 383. Extension 393overlies cam surface 384 (Fig. 3) of latch releasing member 326 which ispivoted at 386 on side member I3. It will be recalled that with thecarriage in the end position shown in Fig. 5, pawl I82 is oscillatedduring each cycle of operation of the actuating means by the engagementof a pin I 6! with cam surface I88. As arm 38! of pawl I62 movesdownwardly shoulder 382 moves into operative engagement with side memberI3 and extension 383 contacts cam surface 384 (Fig. 3). The engagementof shoulder 382 with member I3 blocks unnecessary movement of thecarriage because of the actuation of resetting bar 5!, and theengagement of the extension 383 with cam surface 384 rocks latch releasemember 326 so that latch slide 322 is moved to the right to release key3! I. Spring I81A aids spring I81 in restoring pawl I82 quickly to theposition shown.

Operation The operation of the normalizing mechanism will now bedescribed. Return and reset key 3! I (Fig. 3) is depressed and islatched in depressed position by slide 322. The depression of key 3!!thru arm 3, shaft 3I6 (Fig. 7) and arm 311 moved rod 312 rearwardly toengage shiftable collar 364 with cam hub 36!. The drive con- I nectionfor the zero resetting drive member is lug 382 also .depresses shift key222 to enable the carriage shifting mechanism for shifting the carriageto the left. Such depression of shift key 222 engages the clutch andenables the motor circuit. If"th,e carrlage is positioned in its leftend or lowest order position as viewed from the front of the machine,depression of shift key 222 merely serves to enable the drive for onecycle of operation. During this cycle, slide 33! (Fig. 5) actuatesresetting bar 5! to restore numeral wheels 4! to zero registration, anda pin I6! oscillates pawl I82 to actuate latch releasing member 326 tounlatch key 3!! and thereby shift key 222. However, if the carriage isdisplaced from such left end position, shifting of the carriage to theleft (as viewed from the front of the machine or to the right as viewedin Fig. 5) follows as well as reciprocation of arm 35! and slide 33!.The reciprocation of slide 33! is inefiective until the carriage isreturned to its left end position because the carriage is positioned sothat arm 336 is not engaged by extension 334 of slide 33!. Fig. 9illustrates the condition of the parts when the carriage is moving intoits next lowest order position. In such position the inclined end ofpawl 338 has engaged ledge 342 so that pawl 338 and arm 336 have beenraised by ledge 342 to position the end of arm 336 above extension 334of slide 33!. It will be noted that slide 33! is in its extreme lefthand position and the extent of movement is such that arm 336 andresetting rack bar 5! would be actuated slightly if arm 336 were notraised.

Fig. 10 illustrates the parts as positioned in the cycle of operationwhen the carriage is being shifted from the next lowest order positionto its lowest order or left end position. Thus, pawl 338 has moved offof ledge 342 and allowed arm 823% to fall, the end thereof resting onactuating extension 334 of slide 33!. During the remainder of the lastshifting cycle, the parts move from the positions shown in Fig. 10, tothose illustrated in Fig. 5. During such movement arm 3% drops to activeposition so that the next reciprocation of slide 33! is effective toengage extension 334 with arm 335 and effect the resetting operation.Also, during this cycle, pawl 582 is oscillated to actuate latchreleasing member 326 and release key 3 so that key 3 and shift key 222are free to rise and the operation stops at the end of that cycle.

Thus, depression of key 3 initiates 9. normalizing operation whichincludes the returning of the carriage to its left hand or homeposition, resetting of the accumulator and release of key 3| I. It is tobe noted that during such operation, keys NH (Fig, 1) can be depressedto change the positioning of gears I03 with respect to teeth Hit ofactuating cylinders I01 in accordance with the desired value for thenext succeeding operation. Obviously, by omitting the connections of key3 with the zero resetting drive mechanism, such key would serve as acarriage return key only.

If desired, register wheels H of the revolutions counter can be clearedsimultaneously with numeral wheels 4i of the accumulator and manipulablemeans are provided for connecting the resetting mechanisms of suchregisters together for simultaneous operation. For this purpose rack 16(Figs. 6 and '7 is provided with connecting member 40! pivoted at 402 onbar 16. Member 40! has bent extension 403 which is normally positionedbelow bent end 404 of member 68 on rackbar 5!. Extension 403 ismaintained in such position by bent arm 406 of member lei which extendsacross bar 16 and is normally engaged with the low portion of inclinedcam surface Ml'l of control slide or member 508. Spring tee maintainsarm 336 in engagement with cam surface 401, being tensioned between arm406 and a pin on rack bar 16. Member 408 is slotted to engage studs iiion frame member 36 to provide for endwise movement thereof and hashandle portion M2 which extends through the carriage casing to thereof.Upon movement of slide 408 to the right from the position illustrated inFig." 7, arm 6% of connecting member 40f moves up cam surface dillagainst the urgency of spring 609 to rock connecting member Bill andposition ex tension 03 thereof in the path of extension Mid of member 68on rack bar 55. Thus, rack bar it can be connected for simultaneousmovement with rack bar 5i so that power resetting of both registers canbe effected simultaneously by depression of key 3i i.

Modified power resetting mechanism Figs. 11 through 13 illustrate amodified form of the invention in which shiftable registers can be resetto zero registration independently of the carriage shifting operationand in any displaced position thereof. Such resetting is effected by azero resetting drive member which is normally out of operative relationwith the resetting mechanism in the carriage. Zero resetting key 50E(Fig. 11) is generally similar to key 3 and depression thereof serves toenable the drive connection from the actuating means to thezeroresetting drive member. Key SM is mounted on side member It by stud3i? and-arm 386 in the same manner as key 3 and operates similarly samemanner.

provide for manipulation v through arm 34 3 to establish the driveconnection from an actuating shaft I01 to cam 35% (Fig. 12). To enablethe motor circuit and engage the clutch, key 50l (Fig. 11) has camextension 5632 disposed in operative relation with pin 503 on clutchcontrol lever 50d, which is generally similar to lever ll? of Fig. 4 andopcrates to control clutch IH (Fig. 11) in the Lever 504 is connected bylink 256 to lever 252 (Fig, 3) which through lever 25! controls theengagement of contacts 259 of the motor circuit. Thus, depression of key50! establishes a drive connection from the actuat ing means to the zeroresetting drive member and enables the drive for the actuating means. Itis to be noted that key 50f (Fig. 11) is not latched in depressedposition and exerts no control over shift key 222.

The zero resetting drive member is adapted upon depression of key 5M toeffect zero resetting of the accumulator in any displaced positionthereof. Zero resetting rack bar 51 (Figs. 12 and 13) is identical inconstruction and operation as previously described except that means isassociated therewith for operation by the zero re setting drive memberon placed position of the carriage. Such means comprises strap E06mounted on bar 51 by means of spacers 501 and screws 508. Strap 506 hasa plurality of ordinally spaced projections or lugs 509, one for eachordinal position of the carriage. Lugs 509 are each positioned foroperative relation with lateral actuating extension 5| I on slide 5l2.To provide for endwise movement of slide 5H, slots 5I3 therein areengaged by studs 5 on frame member It. It will be noted that extension5H in its inactive position is below lugs 609 to provide for unimpededshifting of the carriage. To provide for movement of extension Bil intoactive position at the first part of the reciprocation thereof, slotsSIS have upwardly slanted end portions 516 in which' studs bi l arenormally positioned. Upon depression of key 50! and subsequent rotationof cam 356, arm 35! moves slide 5l3 to the left. Slide 5|! and extension5 first move upwardly and to the left so that extension 5| l engages alug 50d. Thereafter the movement of slide 5l2 and extension 5H is linearand strap 508 and rack bar 5i are moved therewith to effect resetting ofthe accumulator. Upon return movement of slide 5E2, extension SM isrestored to the position illustrated in Fig. 12 below lugs 509. Thus,the accumulator can be zeroized in any shifted position of the carriageby manipulation of key 50!. The revolutions counter can be zeroizedsimultaneously with the accumulator as described in connection with thepreferred form of the invention.

1, therefore, claim as myinvention:

1. In a calculating machine, a'shiftable register, actuating meanstherefor, driving means for said actuating means, means for shiftingsaid register with respect to said actuating means by operation of saidactuating means, means for resetting said register to zero registrationby operation of said actuating means, and a manually operable controlkey for said driving means, said shifting means and said resettingmeans.

2. In a calculating machine, a frame, a register shiftable on saidframe, actuating means on said frame for said register, zero resettingmeans associated with said register and shiftable therewith, a drivemember on said frame having a drive connection with said actuating meansand positioned for cooperation with said resetting the frame in any disasiopsi us one position of said register, and control luding a manuallyoperable hey for onv drive connection and for causing operation oi saidactuating means.

in s calculating machine, a frame, a regisshiitable on said frame,actuating means on i sitioned for cooperation with said resetting meansin one position of said register, means for shifting said register, andcontrol means includmanually operable key for determining operation ofsaid shifting means and said actuating means and for enabling said driveconnection.

In a calculating machine, a shiitable regisectuating means for saidregister, drive means said actuating means including a source of powerand a cyclically operable clutch providing the only path of power flowfrom said source of power, means for shifting said register with retosaid actuating means having a normally disabled drive connection withsaid actuating means, means for resetting said register to zero""sistration having a normally disabled drive conii-on with saidactuating means, and selective control means for said clutch and forsaid drive connections between said actuating means and said shiftingand resetting means.

ii. in a calculating machine, a frame, a regiso1 mounted for endwiseshifting movement on aid frame, a source of power, means driven from "dsource of power for shifting said register, neans driven from saidsource of power for ree'tting said register to zero, and control keysfor ,d shifting and resetting means in cooperative relation to enablesimultaneous operation thereof.

a. in a calculating machine, a frame, a regismounted for endwiseshifting movement on frame, a source of power, means driven from saidsource of power for shifting said register, a shift key on said framefor controlling said shiftg means, means driven from said source of forresetting said register to zero, and a resetting control key for saidresetting means ounted on said frame adjacent said shift control toprovide for simultaneous manipulation 3h eef whereby to causesimultaneous operating or said resetting and shifting means.

7. in a calculating machine, a shiftable register, cyclically operableactuating means for said register, drive means for said actuating meansincluding a source of power and 9, cyclically operis clutch providingthe only path of power flow rrorn said source of power, means forshifting s id register with respect to said actuating means including anormally disabled drive connection "with said actuating means, means forresetting said register including a normally disabled drive connectionwith said actuating means, said shiftii g means including yieldablemeans for prevent- -ng shifting of said register. past an end positionthereof irrespective of continued operation of said shifting means, anda. control key for engaging said clutch and enabling said drive.connections reby to effect return of the register to an end position andthen to effect resetting of said reg- 1 during an overdrive cycle oisaid actuating sans after the completion or the shifting operation.

in a calculating machine, a frame, a register sl table on said frame,resetting means asso ed with said register and shiitable therewith,drive means positioned on said frame for cooperlatching means duringresetting of said register while in said end position.

9. In a calculating machine, a frame, a carriage mounted for endwiseshifting movement on said frame, a register on said carriage, resettingmeans for said register on said carriage, actuating means on said frameior said register, means for shifting said register driven from saidactuating means, normally disabled drive means on said frame for saidactuating means, and means including a manipulable control for enablingsaid drive means and for first causing shifting of said carriage to anend position and then for causing operation of said resetting means toeffect reset-- ting of said register in said end position, saidresetting means including a settable control element for disablingoperation of said zero resetting means whereby with said settableelement in active position operation of said manipulable control causespositioning of said carriage in said end position without resetting ofsaid register.

10. In a calculating machine, a shlftable register, actuating means forsaid register including a plurality of parallel actuating shafts, drivemeans for said actuating means including a source of power and acyclically operable clutch, means for shifting said register withrespect to said actuating means including 9, drive element in axialalignment with one of said actuating shafts and shittable means forestablishing a drive connection between said drive element and said oneshaft, means for resetting said register to zero registration includinga second drive element mounted in axial alignment with another of saidactuatlngshaits and shiftable means for effecting a drive connectionbetween said second drive element and said another actuating shaft,- andselective control means for said clutch and for said respectiveshlftable means.

11. In a calculating machine, a shiitable register, actuating means forsaid register, drive means for said actuating means including source ofpower and a clutch, said actuating means including means settable to beineficctive to enter values in said register, selecting mechanism Iorentering values into said machine for entry in said register by saidactuating means, and selectively operable means having a driveconnection with said actuating means for resetting said register to zeroregistration with said actuating means in normal motion and operative totransmit a drive through said drive connection but ineffective to entervalues in said register, said selecting mechanism being conditioned forvalue entering operation during resetting operaticn or said actuatingmeans, and a control key for said selectively operable means operable toengage said clutch and'enable said drive connec tion.

12. In a calculating machine, a frame, a reginter shlitable on saidframe, cyclically operable actuating means on said frame for saidregister, drive means for said actuating means including a source ofpower and a clutch, zero resetting means associated with said registerand shiftable therewith, a drive member on saidframe posi= tioned forcooperation withsaid resetting means in one position of said register, acontrollable drive connection between said drive member and a part ofsaid actuating means, means for shifting said register by cyclicoperation of said actuating means including a controllable driveconnection between said shifting means and a part of said actuatingmeans, and control means for determining operation of said shiftingmeans to place said register in said one position if displaced therefromand for determining operation or said drive member, said control meansincluding a manually operable lrey having controlling connectiori withsaid clutch and said drive connections.

l8, In a calculating machine, a frame,a register shiftable on saidframe, cyclically operable actuating means on said frame for saidregister, drive means for said actuating means including a source ofpower and a clutch, resetting means associated with said register andshiftable therewith, a drive member on said frame positioned forcooperation with said resetting means in one position of said register,a controllable drive connection between said drive member and a part ofsaid actuating means, means for shifting said register by cyclicoperation of said actuating means including a controllable driveconnection between said shifting means and a part of said actuatingmeans, control means including a manually operable key for determiningoperation of said shifting means to place said register in one positionif displaced therefrom and for determin-- ing operation of said drivemember, and means enabled by said hey upon operation thereof forlatching said key in active position.

14. In a calculating machine, a frame, a register shiftable on saidframe, cyclically operable actuatingmeans on said frame for saidregister, drive means for said actuating means including a source ofpower and a clutch, resetting means associated with said register andshiftable therewith, a drive member on said frame positioned forcooperation with said resetting means in one position of said register,a, controllable drive connection between said drive member and a part ofsaid actuating means, means for shifting said register by cyclicoperation oi said actuating means including a controllable driveconnection between said shifting means and a part of said actuatingmeans, control means including a mam asiaasi ually operable key fordetermining operation of said shifting means to place said register inone position if displaced therefrom and for determin. ing operation ofsaid drive member, means for preventing operative engagement of saiddrive member with said resetting means until said register is positionedin said one position by operation of said shifting means, means forlatching said key in active position, and means for disabling saidlatching means during the cycle of operation of said actuating means inwhich said drive member operates said zero setting means.

15. In a calculating machine, a frame, a register, carriage" carryingsaid register shiftable on said frame to a plurality of operatingpositions, actuating means for said register, drive means for saidactuating means including a source of power and a clutch, controllablemeans having a normally inactive drive connection with a part of saidactuating means for returning said carriage to an end position thereoffrom any other position thereof, and control means for said returningmeans including a key operable by a single manual stroke to engage saidclutch and enable said drive connection.

16. In a calculating machine having a frame, a register mounted forendwise shifting movement on said frame, resetting means for saidregister, and shifting means for said register, in combinatlon withregister return and resetting means for controlling simultaneousoperation of said shifting and resetting means to cause resetting ofregister and return of said register to an end position if displacedtherefrom, said controlling means including a resetting control key anda shift control lrey mounted on said frame in juxtaposed relation forsimultaneous depression by a single manual stroke.

17. In a calculating machine having a shiftable carriage, a register insaid carriage, in com= bination shifting means for said carriageincluding a key, resettingmeans for said register including a second keymounted in juxtaposed relation to said first key for simultaneousoperation therewith, and means responsive to depression of both of saidkeys for initiating operation of both said shifting and resetting meansto cause resetting of said register and to invariably cause shifting ofsaid carriage to an end position thereof, whereby said register ispositioned in said end position and stands at zero registration. 1

CARL M. F. 1w

